Upgrade metrics-graphite to 3.2.2

Change-Id: Ia378c0ef22fc5635e6fc29d1ff006e42d2badbca

external_plugin_deps.bzl

diff --git a/external_plugin_deps.bzl b/external_plugin_deps.bzl
index 61e9951..0017adc 100644
--- a/external_plugin_deps.bzl
+++ b/external_plugin_deps.bzl
@@ -3,6 +3,6 @@
 def external_plugin_deps():
   maven_jar(
     name = 'metrics_graphite',
-    artifact = 'io.dropwizard.metrics:metrics-graphite:3.2.1',
-    sha1 = '97b0457cab5ee94da3a946f6bb95053fac2181e2',
+    artifact = 'io.dropwizard.metrics:metrics-graphite:3.2.2',
+    sha1 = '908e8cbec1bbdb2f4023334e424c7de2832a95af',
   )